Data transfer system

Claim 1

A DATA PROCESSING SYSTEM COMPRISING: A PLURALITY OF DATA SOURCES, EACH OF SAID DATA SOURCES SUPPLYING A DATA UNIT AT INTERVALS; A SIGNAL GENERATOR FOR EACH OF SAID SOURCES FOR PROVIDING A SIGNAL WHEN THE RESPECTIVE ONE OF SAID SOURCES IS READY TO SUPPLY A DATA UNIT; A DATA STORAGE UNIT FOR STORING A PLURALITY OF DATA ITEMS IN A CORRESPONDING PLURALITY OF STORAGE LOCATIONS, WHEREIN A STORAGE LOCATION IS ALLOCATED TO EACH OF SAID SOURCES FOR STORING AN IDENTIFICATION DATA ITEM IDENTIFYING A RESPECTIVE STORAGE LOCATION FOR RECEIVING A DATA UNIT SUPPLIED BY THE CORRESPONDING SOURCE; A FIRST REGISTER FOR STORING A REPRESENTATION OF AN IDENTIFICATION DATA ITEM; A SECOND REGISTER FOR RECEIVING A REPRESENTATION OF A DATA ITEM AND FOR TRANSMITTING SAID REPRESENTATION TO SAID FIRST REGISTER WHEN RECEIVED THEREBY; MEANS RESPONSIVE TO ANY ONE OF SAID SIGNALS FOR TRANSFERRING TO SAID SECOND REGISTER A REPRESENTATION OF THE IDENTIFICATION DATA ITEM IN THE ONE OF SAID STORAGE LOCATIONS ALLOCATED TO THE DATA SOURCE CORRESPONDING TO SAID ONE SIGNAL; MEANS RESPONSIVE TO THE CONTENTS OF SAID FIRST REGISTER AND ENABLED FOLLOWING TRANSMISSION OF ONE OF SAID REPRESENTATION TO SAID FIRST REGISTER FOR TRANSMITTING THE DATA UNIT SUPPLIED BY THE CORRESPONDING DATA SOURCE TO THE STORAGE LOCATION IDENTIFIED BY SAID ONE REPRESENTATION; MEANS FOR MODIFYING THE IDENTIFICATION ITEM IN SAID SECOND REGISTER TO IDENTIFY A DIFFERENT STORAGE LOCATION, SAID MEANS FOR MODIFYING BEING OPERABLE FOLLOWING THE TRANSMISSION OF A REPRESENTATION OF THE CONTENTS OF SAID SECOND REGISTER TO SAID FIRST REGISTER; AND MEANS FOR TRANSFERRING THE MODIFIED CONTENTS OF SAID SECOND REGISTER TO SAID ONE STORAGE LOCATION.